scholarly journals MIXING OF FERMION FIELDS OF OPPOSITE PARITIES AND BARYON RESONANCES

2011 ◽  
Vol 26 (14) ◽  
pp. 2307-2326 ◽  
Author(s):  
A. E. KALOSHIN ◽  
E. A. KOBELEVA ◽  
V. P. LOMOV
Keyword(s):  
Specific Form ◽  
Interesting Application ◽  
Resonance States ◽  
Partial Waves ◽  
Fermion Fields ◽  
Boson Case ◽  
Baryon Resonances

We consider a loop mixing of two fermion fields of opposite parities whereas the parity is conserved in Lagrangian. Such kind of mixing is specific for fermions and has no analogy in boson case. Possible applications of this effect may be related with physics of baryon resonances. The obtained matrix propagator defines a pair of unitary partial amplitudes which describe the production of resonances of spin J and different parity 1/2± or 3/2±. The use of our amplitudes for joint description of πN partial waves P13 and D13 shows that the discussed effect is clearly seen in these partial waves as the specific form of interference between resonance and background. Another interesting application of this effect may be related with partial waves S11 and P11, where the picture is more complicated due to presence of several resonance states.

scholarly journals Conformal gravity with electrodynamics for fermion fields and their symmetry breaking mechanism

2014 ◽  
Vol 11 (03) ◽  
pp. 1450019 ◽  
Author(s):  
Luca Fabbri
Keyword(s):  
Scalar Fields ◽  
Specific Form ◽  
Conformal Gravity ◽  
Field Equations ◽  
Cosmological Constant Problem ◽  
Conformal Theory ◽  
Fermion Fields ◽  
Breaking Mechanism ◽  
Cosmological Constants ◽  
Dirac Spinors

In this paper, we consider an axial torsion to build metric-compatible connections in conformal gravity, with gauge potentials; the geometric background is filled with Dirac spinors: scalar fields with suitable potentials are added eventually. The system of field equations is worked out to have torsional effects converted into spinorial self-interactions: the massless spinors display self-interactions of a specific form that gives them the features they have in the non-conformal theory but with the additional character of renormalizability, and the mechanisms of generation of mass and cosmological constants become dynamical. As a final step we will address the cosmological constant problem and the coincidence issue.

Introductory remarks concerning duality

1970 ◽  
Vol 318 (1534) ◽  
pp. 245-255
Keyword(s):  
Partial Wave ◽  
Resonant Scattering ◽  
Mass Range ◽  
High Energy ◽  
Momentum Range ◽  
Resonance States ◽  
Partial Waves ◽  
Pion Nucleon ◽  
High Energy Reaction ◽  
Reaction Processes

At the time when this Discussion Meeting was proposed, it was clear that for many systems, such as the pion-nucleon system or the pion-pion system, there exist many resonance states, perhaps even increasing exponentially in number as the mass range explored moves to higher values (Barash-Schmidt et al. 1969). It was also clear that many high-energy reaction processes which are peripheral in character are mediated by simple processes of reggeon exchange. An outstanding example was the process of pion-nucleon charge-exchange, π - + p → π 0 + n, which Hohler, Baacke, Schlaile & Sonderegger (1966) found to be well described over the momentum range p lab = 4 to 18 GeV/ c as due to exchange of a reggeon of the ρ trajectory, and from which they determined the parameters of the ρ trajectory over the range 0 to 1 (GeV/ c ) 2 for the momentum transfer variable - t . It had generally been conventional to analyse the differential cross-section and polarization data on meson-baryon scattering in terms of independent partial wave amplitudes. This was certainly appropriate for those partial waves for which there occurred resonance states in the energy range considered, and for which the partial wave amplitudes were therefore rapidly varying; scattering in the other partial waves (as well as the non-resonant scattering in the resonating partial waves) was then termed ‘background scattering’.

Baryon Resonances in Nuclei

1972 ◽  
Vol 33 (C5) ◽  
pp. C5-171-C5-182 ◽  
Author(s):  
Michael Danos
Keyword(s):  
Baryon Resonances

Critique virale et genre trafiqué dans Valérie par Valérie par La Rédaction

2020 ◽  
Vol 59 (1) ◽  
pp. 51-66
Author(s):  
Gabriel Proulx
Keyword(s):  
Specific Form ◽  
Economic Mechanism ◽  
Ethical Implications ◽  
Literary Forms ◽  
Dominant Ideologies ◽  
Critical Paths ◽  
Political Economic

Valérie par Valérie opens new critical paths which are fertile, though difficult to unpack. Published under the enigmatic and collective name La Rédaction, this book – whose main (or only) author seems to be Christophe Hanna – develops what we could call a viral critique, which seeks to occupy dominant ideologies to undermine them from within rather than oppose them with a new ideology. This article aims firstly to define Hanna's viral critique, based on his own theoretical works and Guy Debord's notion of spectacle as a social and economic mechanism. It then analyzes the specific form taken by that critique in Valérie par Valérie, where the author opposes the separation of literary and non-literary forms, as well as contemporary ultracapitalism and its political-economic ramifications. Finally, the ethical implications of this type of implicit critical exercise are explored through semioethics, in order to determine the efficiency of Hanna's project.

Wissenskommunikation multimodal: Wie Museumsbesucher sich über eine Museumsvitrine verständigen

Fachsprache ◽  
2017 ◽  
Vol 32 (3-4) ◽  
pp. 122-144
Author(s):  
Wolfgang Kesselheim
Keyword(s):  
Field Experiment ◽  
Conversation Analysis ◽  
Knowledge Construction ◽  
Specific Form ◽  
Knowledge Communication

In the present paper I will study conversations in front of museum showcases as a specific form of knowledge communication. After presenting my understanding of the concepts“knowledge communication” and “knowledge”, which are informed by conversation analysis, I will explore two characteristic aspects of the ‘showcase conversations’ by means of a number of detailed analyses of short extracts of these conversations. First, I will show how knowledge is interactively produced and made publicly visible, and second, how people use the complex multimodal environment of the showcase as a basis for their knowledge construction, and how they manage to ‘tie together’ different semiotic “modes” which are visible and readable in display cases. The analyses of this paper are based on a corpus collected in a paleontological museum. The conversations have been recorded in a kind of ‘field experiment’: Probands have been asked to watch a showcase together and to summarize its content. While doing so they were filmed.

Beauty and truth, truth and beauty: Chiasmus and the Keats heuristic

2020 ◽  
Author(s):  
Mane Kara-Yakoubian ◽  
Alexander C. Walker ◽  
Constantine Sharpinskyi ◽  
Garni Assadourian ◽  
Jonathan Albert Fugelsang
Keyword(s):  
Specific Form ◽  
Current Work ◽  
Reverse Order ◽  
Potential Mechanism

The Keats heuristic suggests that people find aesthetically pleasing expressions more accurate than mundane expressions. We test this notion with chiastic statements. Chiasmus is a stylistic phenomenon in which at least two linguistic constituents are repeated in reverse order, following an A-B-B-A pattern. Our study focuses on the specific form of chiasmus known as antimetabole, in which the reverse-repeated constituents are words (e.g., “all for one and one for all”). In 3 out of 4 experiments (N = 797), we find evidence that people judge antimetabolic statements (e.g., “Success is getting what you want. Happiness is wanting what you get.”) as more accurate than semantically equivalent non-antimetabolic statements (e.g., “Success is getting what you wish. Happiness is wanting what you receive.”). Furthermore, we evaluate fluency as a potential mechanism explaining the observed accuracy benefit afforded to antimetabolic statements, finding that the increased speed (i.e., fluency) with which antimetabolic statements were processed was misattributed by participants as evidence of greater accuracy. Overall, the current work demonstrates that stylistic factors bias assessments of truth, with information communicated using aesthetically pleasing stylistic devices (e.g., antimetabole) being perceived as more truthful.

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